#pragma comment(linker, "/STACK:10000000")
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <set>
#include <map>
#include <cstdio>
#include <cassert>
#include <string>
#include <cstring>
#define ldb long double
#define LL long long
#define fi first
#define se second
#define fill(a, c) memset(a, c, sizeof(a))
#define sqr(a) ((a) * (a))
#define nextLine() {int c = 0; while((c = getchar()) != 10 && c != EOF);}
#define debug(a) cerr << #a << " = " << a << " ";
#define debugl(a) cerr << #a << " = " << a << "\n";
const ldb LDINF = 9128739847123.00;
const ldb eps = 1e-9;
const int INF = 1 << 30;
const ldb pi = fabsl(atan2(0.0, -1.0));
using namespace std;


int al, bl, ar, br;

void Load()
{
	cin >> al >> ar >> bl >> br;
}

int check(int a, int b)
{
	return b >= a - 1 && b <= 2 * (a + 1);
}

void Solve()
{
	if (check(ar, bl) || check(al, br)) cout << "YES";
	else cout << "NO";

}

int main()
{
	Load();
	Solve();
	return 0;
}